公开(公告)号：US10457661B2

公开(公告)日：2019-10-29

申请号：US16070691

申请日：2016-11-25

申请人： Toyo Seikan Co., Ltd.

发明人： Takuro Ito ,  Junko Tanabe ,  Tomoaki Taguchi

IPC分类号： C07D319/12 ,  C08J11/16

摘要： A method of recovering lactide which includes throwing a polylactic acid and a depolymerization catalyst into an extruder (1) communicated with a vent chamber (3) maintained under a reduced pressure, melt-kneading the polylactic acid and the depolymerization catalyst together in the extruder (1), feeding the melt-kneaded product thereof into the vent chamber (3), depolymerizing the polylactic acid in the vent chamber (3), gasifying the formed lactide and recovering the gasified lactide from the vent chamber (3).

公开(公告)号：US10336882B2

公开(公告)日：2019-07-02

申请号：US15779911

申请日：2016-12-07

申请人： Toyo Seikan Co., Ltd.

发明人： Takuro Ito ,  Junko Tanabe ,  Tomoaki Taguchi

IPC分类号： C07D323/04 ,  C08J11/16 ,  B29B17/00 ,  C07D319/12

摘要： A method of recovering lactide which includes introducing a molten resin composition that contains a polylactic acid, a depolymerization catalyst and a carrier resin into a vent chamber (3) that is maintained under a reduced pressure using a first screw conveyer passage (11) that extends in the vent chamber (3), gasifying the lactide contained in the molten resin composition, and recovering a gaseous lactide from the vent chamber, wherein a second screw conveyer passage (60) is provided under the first screw conveyer passage (11) in the vent chamber (3) to recover the carrier resin.

公开(公告)号：US10344161B2

公开(公告)日：2019-07-09

申请号：US15502796

申请日：2015-08-06

申请人： TOYO SEIKAN CO., LTD.

发明人： Takuro Ito ,  Hiroaki Sugioka ,  Takahiro Okubo ,  Satoru Kito ,  Junko Tanabe

IPC分类号： C08L67/04 ,  B32B9/00 ,  B32B27/36 ,  B65D23/02 ,  B65D1/02 ,  C08L23/04 ,  C08L101/16

摘要： A polylactic acid composition including polylactic acid and an ethylene resin, characterized in that the ethylene resin is selected so that a melt flow rate ratio (RMF), defined by the following equation (1): RMF=APLA/BPE (1) where APLA represents the melt flow rate of the polylactic acid measured at 210° C. and 2.16 kg, and BPE represents the melt flow rate of the ethylene resin measured at 190° C. and 2.16 kg, in a range of 0.5 to 10 is satisfied. Also disclosed is a stretch-molded bottle formed using the polylactic acid composition. The polylactic acid composition is preferably used in molding a container particularly improved in alkali resistance and environmental stress crack resistance.